Diamonds Are Lakisha's Best Friend

TMZ has just learned that on tonight's episode of "American Idol," Lakisha Jones will sing the Shirley Bassey hit "Diamonds Are Forever" as part of the 60s British Invasion music theme.

A source in the audience at tonight's dress rehearsal, also tells TMZ that Sanjaya's BFF will be dripping in head to toe Kwiat diamonds. Bling and sing, honey! You glow girl!